JPS61229241A - 光学的読取装置 - Google Patents
光学的読取装置Info
- Publication number
- JPS61229241A JPS61229241A JP7065585A JP7065585A JPS61229241A JP S61229241 A JPS61229241 A JP S61229241A JP 7065585 A JP7065585 A JP 7065585A JP 7065585 A JP7065585 A JP 7065585A JP S61229241 A JPS61229241 A JP S61229241A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- receiving element
- light receiving
- disk
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000013459 approach Methods 0.000 abstract description 8
- 239000004065 semiconductor Substances 0.000 abstract description 6
- 230000004907 flux Effects 0.000 abstract description 4
- 230000021615 conjugation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 201000009310 astigmatism Diseases 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 235000013527 bean curd Nutrition 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7065585A JPS61229241A (ja) | 1985-04-03 | 1985-04-03 | 光学的読取装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7065585A JPS61229241A (ja) | 1985-04-03 | 1985-04-03 | 光学的読取装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61229241A true JPS61229241A (ja) | 1986-10-13 |
| JPH0556568B2 JPH0556568B2 (enrdf_load_stackoverflow) | 1993-08-19 |
Family
ID=13437883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7065585A Granted JPS61229241A (ja) | 1985-04-03 | 1985-04-03 | 光学的読取装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61229241A (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6111647A (en) * | 1998-04-22 | 2000-08-29 | Nec Corporation | Detection of focal point of objective lens by means of a two-split sensor |
-
1985
- 1985-04-03 JP JP7065585A patent/JPS61229241A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6111647A (en) * | 1998-04-22 | 2000-08-29 | Nec Corporation | Detection of focal point of objective lens by means of a two-split sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0556568B2 (enrdf_load_stackoverflow) | 1993-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH04353633A (ja) | 光ディスク装置のエラー信号生成装置 | |
| JPS61229241A (ja) | 光学的読取装置 | |
| JPH0690817B2 (ja) | 光ピツクアツプ | |
| KR100636122B1 (ko) | 광픽업용 시크 방향 검출신호 생성장치 | |
| JPS59231736A (ja) | フォーカスおよびトラッキング誤差検出装置 | |
| JPS6043234A (ja) | 光デイスクヘツドのフオ−カスずれ検出装置 | |
| JPS61227233A (ja) | 光学的読取装置 | |
| JP2552660B2 (ja) | フオ−カス誤差検出装置 | |
| EP1067531A1 (en) | Optical pickup device capable of stable tracking | |
| JPH01303632A (ja) | 光デイスク装置 | |
| JPS5984352A (ja) | 焦点誤差検出装置 | |
| JPS6142743A (ja) | 光学的情報読取装置 | |
| JPH0656673B2 (ja) | 光ピツクアツプ | |
| JP2686323B2 (ja) | フォーカス誤差検出装置 | |
| JP3443839B2 (ja) | 光磁気ディスク装置及び誘電体光路部材 | |
| JPS6142745A (ja) | 光学的情報読取装置 | |
| KR930703669A (ko) | 합초검출기구 및 그것을 사용한 광헤드와 광기억장치 | |
| JPH0240576Y2 (enrdf_load_stackoverflow) | ||
| JPS61172226A (ja) | 光学的情報読取装置 | |
| JPS59231738A (ja) | 光ピツクアツプ | |
| JPS61113137A (ja) | 光学ヘツド | |
| JPS59116938A (ja) | 光情報検出装置 | |
| JPS62143235A (ja) | 光情報記録再生装置の焦点ずれ検出装置 | |
| JPS60177436A (ja) | 光ピツクアツプ | |
| JPH02192040A (ja) | 光ピックアップ装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |